The Central Bank Super Week: A Historic Monetary Fracture

The week of 10-18 June 2026 will be remembered as the « central bank super week » — five monetary policy decisions compressed into eight days: the Fed on 16-17 June, followed by the ECB, the Bank of Japan, the Bank of England, and the Swiss National Bank in the days that followed. The conclusion drawn from this exercise is striking: for the first time since 2022, the three major global central banks are taking strictly divergent paths.

On one side, Kevin Warsh, the Federal Reserve’s new chairman since January 2026, kept US policy rates unchanged in the 3.50-3.75% range, while strongly signalling that the next move could be a hike rather than a cut. The updated dot plot reflects a median rate of 4.00-4.25% by end-2026 — an additional half-point of tightening. On the other side of the Atlantic, Christine Lagarde’s ECB raised rates by another quarter point, remaining the only major central bank still in active tightening mode, with core inflation in the eurozone at 2.7%. In Tokyo, the Bank of Japan opted for measured normalisation (+25 basis points, bringing rates to 1%), without hampering an equity market that is posting one of the world’s best performances this year.

For wealth management investors, this configuration is simultaneously a source of complexity and a field of opportunities. It requires moving away from a logic of unified monetary cycles — in which all central banks moved in tandem — towards reasoning in terms of regional divergence, rate spreads, and cross-border capital flows. It is precisely in these friction zones that active allocations create value.

The ECB Alone Raising Rates: The European Exception and Its Bond Implications

The ECB’s June 2026 decision was not entirely unexpected, but it confirms an uncomfortable reality for European bond investors: eurozone inflation refuses to converge towards the 2% target. The underlying component — which excludes energy and food — stands at 2.7%, driven by services, certain housing categories, and wage dynamics that have proven more robust than anticipated in Southern European countries.

This latest hike had an immediate effect on bond markets. The German 10-year Bund, the eurozone’s reference benchmark, saw its yield reach 2.99% — its highest level since autumn 2023. French 10-year OATs followed at 3.65%, maintaining a Bund-OAT spread of around 65 basis points, stable but warranting close monitoring given France’s still-constrained fiscal position. Peripheral bonds (Italy, Spain) remain under pressure, with Italian BTPs at 10 years stabilising around 4.05%.

For a portfolio already exposed to long-duration European bonds, the dynamic is paradoxical: new issuances offer more attractive yields, but existing holdings in the portfolio are registering latent capital losses. The strategy to favour in this context is twofold: reduce the average duration of European bond portfolios (prefer 2-5 year maturities over long-end exposure) and increase selectivity on issuer quality, steering clear of European high yield bonds whose spreads, at 380 basis points, appear too compressed given the ongoing tightening cycle.

The Nikkei at 71,000: Japan’s 2026 Surprise

Undoubtedly the most spectacular performance of the first half of 2026 belongs to the Japanese equity market. The Nikkei 225 broke above 71,000 points on 19 June 2026, setting a new all-time record with a gain of +31.8% since 1 January. This outperformance is all the more remarkable given that it is occurring in a context of monetary normalisation — the Bank of Japan raised rates to 1%, a level many analysts feared would weigh on valuations.

Three drivers explain this resilience. First, earnings revisions: major Japanese companies reported results above expectations for fiscal year 2025, supported by a yen that, despite the BoJ’s normalisation, remains competitive for exporters (Toyota, Sony, Fanuc, Keyence). Second, the corporate governance reform initiated by the Tokyo Stock Exchange — which is pushing listed companies to improve return on equity (ROE) and return more value to shareholders through buybacks and dividends — is beginning to produce tangible and measurable results. Third, the return in force of foreign institutional investors, long absent from a Japanese market perceived as stagnant, who are reassessing their exposure in the light of these structural transformations.

For a wealth portfolio denominated in euros, Japanese equities offer a dual opportunity: performance in yen and additional upside potential if the BoJ’s normalisation continues and drives yen appreciation against the euro. Currency risk remains real, but it can be managed through euro-hedged Japanese equity funds, which allow investors to capture stock market performance without bearing the full EUR/JPY volatility.

A Hawkish Fed, the Dollar, and US Rates at 4.46%: A Bond Window Not to Be Ignored

Kevin Warsh’s hawkish stance produced two distinct and measurable effects on currency and rate markets in the days following the FOMC. On rates, the 10-year US Treasury yield touched 4.46% in the aftermath — creating a 147 basis point spread with the German Bund. This is a level that European institutional investors have not seen since 2023, and one that makes mid-duration US government bonds particularly attractive in terms of absolute carry. The US yield curve is now positively sloped (+27 basis points on the 2-10 year segment), meaning 3-7 year Treasuries offer yields between 4.19% and 4.46% without excessive duration risk exposure.

On currencies, EUR/USD recorded a significant move: from 1.2019 (peak in April 2026, linked to geopolitical easing in the Middle East) to 1.1462 by mid-June — a 4.6% depreciation of the euro in less than two months. For a euro-denominated investor holding unhedged dollar assets, this movement represents a currency loss that mechanically erodes part of the dollar-denominated gains. The decision to hedge or not hedge currency risk depends on the investment horizon and the cost of hedging: currently, 12-month EUR/USD hedging is available at approximately 1.2% per annum, which remains reasonable given the rate differential.

Three scenarios frame possible trajectories for the second half of 2026. The central scenario (50% probability) sees a prolonged Fed pause, with US 10-year yields stabilising between 4.3% and 4.6%, and a strong but stable dollar. The hawkish scenario (25%) envisages a Fed hike in December, with the 10-year US yield moving towards 4.8-5%, offering enhanced bond opportunity for investors with liquidity to deploy. The dovish scenario (25%) — faster-than-expected easing of US inflation — would allow the Fed to consider a cut as early as Q1 2027, benefiting both equities and bonds.

How to Position Your Portfolio in the Face of Divergence

In an environment of monetary divergence, portfolio construction must be organised around three complementary levels of thinking.

Managing bond duration is the first priority. With the ECB still in tightening mode and the prospect of persistently elevated rates in the eurozone, long-duration European bonds (maturities of 10 years and beyond) remain exposed to upward pressure on yields and therefore downward pressure on prices. The strategy is to concentrate European bond exposure in the 2-5 year maturities, which offer satisfactory yields of 2.8-3.2% with significantly lower price volatility. For investors seeking higher bond yields, US Treasuries at 3-7 years (4.2-4.5%) represent a serious alternative, subject to a coherent currency hedging policy.

International exposure and geographical diversification constitute the second lever. Monetary divergence creates opportunities outside the eurozone worthy of attention. Japanese equities, with a YTD performance of +31.8% supported by solid fundamentals, can represent a tactical allocation of 5-8% in a balanced portfolio. Preferred access comes through index ETFs (Nikkei, TOPIX) or specialised active funds, in euro-hedged versions for more defensive profiles. Quality emerging markets — India, Southeast Asia — also warrant monitoring in this context of global value chain relocalisation.

Protection against persistent inflation constitutes the third pillar. Gold, maintaining itself between $3,200 and $3,300 per ounce, retains its function as a safe haven and inflation hedge in an environment where price pressures, even as they moderate, refuse to converge towards central bank targets. A gold allocation of 5-7% in a mixed portfolio remains justified by the context. Energy — with Brent having retreated to $80-82/barrel following the Strait of Hormuz detente — offers residual exposure to geopolitical risk premia without excessive cost.